Hello mate, and welcome to the site, first of all check in your picture where you come from ? I think you mean Crawley Not Crawlet ( wink )
Pm7 = good guns = Proto Matrix Year 2007, Not to be confused with PMR7 as these are = Proto Matrix Rail = nothing but always going down ?? ( not just mine but many Opinion ) they have a different bolt system, ( must go into the gun one way )
The PM7 is great with the bolt that slides in any way you want, They rely very much on a ribbon that goes from the board in the grip going up into the top half of the gun to the eyes, this ribbon you must be very careful when handling it, NO creases, No sharp bends, and mostly never get it caught between the top half and the bottom half of the gun, it will cease to work properly with you going into the Default mode of 8 x balls per second ( max rate of fire ) and if that happens you need to turn off the eyes while your playing to up your firing rate, don`t worry this will be ok.
until you fix the ribbon, I say this because the ribbon is usually the problem, or the battery, always ... if you can, use a Duracell , DO NOT BUY CHEAP BATTERIES
all guns come with a stock barrel but you`ll find most will buy an extra 14" Lightweight barrel probably a Carbon barrel and WOW you`ll see the difference !!
The PM8 was probably the best gun that Proto made, maybe have a look at that ??
you should be able to get spares ( ribbon ) from Dye in Croydon, Direct from UK head office